Metro waives parking fees at the regional parks that normally charge on Martin Luther King Jr. Day: Oxbow and Blue Lake regional parks, Broughton Beach, and the M. James Gleason and Chinook Landing boat ramps. Oxbow's old-growth forest along the Sandy River is a fine place for a winter walk, and Broughton Beach puts you on the Columbia with views of planes landing at PDX. Pair a morning of service with an afternoon outside. Parking at Metro's other parks is free year-round.